Orbit 83521 User manual

Brand: Orbit

Model: 83521

Category: Thermostats

Type: User manual

Clear Comfort

Pro

7-day Programmable

Thermostat

User Guide

Model 83521

IMPORTANT Make sure to label your wires with

the included wire labels before removing your old

thermostat (see page 8).

We also recommend taking a picture of the current

wiring before disconnecting.

i 1

TABLEOFCONTENTS

Thank you for purchasing the Clear Comfort® Pro thermostat from Orbit

We are excited to provide you a long-lasting thermostat that blends style with function.

Features

• Easily program 7 individual days or copy one programmed day to another

• Pre-programmed and ready to go with Energy Star

seings

• Large backlit display is easy to read

• Early start ensures the desired temperature is reached at the scheduled time

• Precision control keeps the temperature within 1°F of set level

• Override the schedule temporarily or permanently

Quick Reference

Easy 1-2-3 Operation ..................................................................... 2

Thermostat Controls ....................................................................3

Display Screen .................................................................................4

Before You Begin............................................................................ 5

Installation

Installing Your Thermostat.......................................................... 7

Temperature Format .................................................................... 17

Reset Buon....................................................................................17

Advanced System Setup ............................................................18

Operation

Set Time and Day .........................................................................22

Select Mode and Fan Seings ................................................23

Programmed Schedules .............................................................24

Energy Star

Programmed Schedule ....................................25

Modifying the Programmed Schedule ................................. 26

Using the Copy Feature.............................................................27

Overriding Schedules Temporarily........................................28

Overriding Schedules Permanently ...................................... 29

Turning Oﬀ Schedules .............................................................. 30

Compressor Protection .............................................................. 31

Early Start........................................................................................32

Appendices

Replacing the Baeries .............................................................. 33

Troubleshooting ............................................................................34

Customer Assistance ................................................................. 40

Warranty ...........................................................................................41

2 3

MODE Switch:

Select between

Heat/Oﬀ/Cool

p/q Buons: Press to

adjust temperature or use to

navigate during set up

HOLD: Press to override

programmed schedule

RUN:Press to resume

programmed schedule

FAN Switch:

Select between

Auto Fan/Fan On

SET:Press to set

schedule, time, and day

Backlit Screen:

Press any buon to activate

1. Set the time and day ........................................................................................................................See page 20

2. Select whether to heat or cool ....................................................................................................See page 21

3. Select fan seing ...............................................................................................................................See page 21

Your thermostat is now ready to use, simply press RUN. If you do not wish to use

the preprogrammed Energy Star

thermostat seings you can:

Modify the programmed schedule ...................................................................................................See page 24

Temporarily override the programmed schedule ....................................................................... See page 26

Permanently override the programmed schedule ..................................................................... See page 27

EASYOPERATION THERMOSTATCONTROLS

4 5

Heating system is on

Fan seing

Fan is activated

Room temperature

Reminder to

change baeries

Desired

temperature

seing

Schedule period

Current day of the week

Current time

Indicate which

mode the

system is in

Cooling system is on This thermostat is compatible with

the following systems:

• Gas, oil or electric furnace

• Central air conditioner

• 2 wire hot water system with or without pump

• Millivolt system

• Central heating and cooling system

• Heat pump without auxiliary/backup heat

Tools Required For Installation

• Phillips screwdriver

• Wire cuers/strippers

• Drill with 3/16" (4.8 mm) drill bit

• Level

BEFOREYOUBEGINDISPLAYSCREEN

This thermostat is not compatible with

base board heaters (or other line voltage

heating), multi-stage heating or cooling

systems, or 3-wire hydronic systems.

6 7

Take a picture or make note of

the current wiring for reference.

Mercury Notice: If your old thermostat

contains mercury contact your local waste

management authority for information on

how to safely dispose of it.

When replacing an existing thermostat,

position your new Clear Comfort® Pro

thermostat in the same location as your

old one, unless the conditions that follow

suggest otherwise. For a new installation,

follow these guidelines for placement:

• Place the thermostat in a room or hallway that

is used oen; position on an inside wall about 5'

(1.52 m) from the ﬂoor.

• Avoid installing the thermostat in overly warm

areas (e.g., near a television, lamp, radiator, or

ﬁreplace), in direct sunlight, or

on a wall that has hot water pipes or that is

opposite a stove.



Switch Oﬀ Power

Turn oﬀ the power to the heating

and cooling equipment.



Remove Cover

Remove the front cover from the

old thermostat.

TIPSFORINSTALLATION INSTALLINGYOURTHERMOSTAT

• Avoid installing the thermostat in

overly chilled areas, such as in a dray area (e.g.,

stairwell, door, or window),

on a wall separating an unheated room,

or where air circulation is poor

(e.g., in a corner or behind a door).

• Avoid installing the thermostat in damp areas, as

this can lead to corrosion.

• Do not install the thermostat until construction

work is complete, the area is dust free, and

painting is completed.

• If the thermostat housing is cold, wait for it to

reach room temperature before installing.

Y W

0/B

Y W

8 9

INSTALLINGYOURTHERMOSTATINSTALLINGYOURTHERMOSTAT



Mount New Base

a. Remove the thermostat body from

the base by gently pulling them apart.

b. Place the base ﬂat against the wall by

feeding the wires through the opening

below the wiring terminal.

c. Level the base and mark the holes for

the mounting screws with a pencil.

d. Remove the base and drill holes at

marked positions. Insert the provided

wall anchors.

e. Feed wires back through the opening

and aach the base to the wall with

the screws provided.



Label Wires

Use the supplied wire labels to identify the

wire by its terminal leer and not the color.

Once the wires are labeled, disconnect the

wires and remove the base.

While labeling and removing the

individual wires DO NOT let the wire

fall back inside the wall.

B B

G G

R R

VR V

X X

Y Y

H H

RC RC

W W

X X

C C

L L

RH RH

W

X X

W

E E

O O

T T

W

Y Y

W

F F

P P

U U

W

Y Y

W

AUX

G O/B Y W RC R

Y W

0/B

Y W

10 11

CAUTION: Stripping too much insulation from the end of a wire creates the

potential for shorting between wires and could prevent proper function of the thermostat.

INSTALLINGYOURTHERMOSTATINSTALLINGYOURTHERMOSTAT

Wire Installation for Heat Pump Systems

a. Loosen the screws on each terminal.

b. Insert jumper wire into the Y and W

terminals.

c. Insert each labeled wire into the matching

terminal and tighten the screws.

d. Wrap exposed areas of any unused wire

with electrical tape.



Wire Installation

for Conventional Systems

a. Loosen the screws on each terminal.

Note: Remove jumper wire if you have both

R and RC wires.

b. Insert each labeled wire into the matching

terminal and tighten the screws.

c. Wrap exposed areas of any unused wire

with electrical tape.

d. Continue to page 12.

screw screw

labeled

wire

labeled

wire

/"

9.5 mm

Note: Expose 3/8" of each wire for proper installation.

RR RCRC WW YY GG O/BO/B

jump wire

12 13

INSTALLINGYOURTHERMOSTATINSTALLINGYOURTHERMOSTAT

Less Common Heat Pump Systems

Wire Installation for Less Common

Conventional Systems



TAPE

Aux

TAPE

O/B

Note: Most systems can be wired using the

wiring diagrams and instructions on pages 10

& 11. If your thermostat wiring does not match

those wiring conﬁgurations, use the diagrams

and instructions on pages 12 & 13.

Note: Most systems can be wired using the

wiring diagrams and instructions on pages 10

& 11. If your thermostat wiring does not match

those wiring conﬁgurations, use the diagrams

and instructions on pages 12 & 13.

If Y2 or W2 wires are

present, the Orbit

thermostat is not

compatible with your

system.

If your existing thermostat

has V1, W1, and W2 wires,

stop now and contact a

qualiﬁed HVAC technician

for assistance.

If your existing thermostat

has L, F, E, or Aux wires,

the Orbit thermostat is

not compatible with your

system.

Remove metal jumper

connecting R & Rc terminals

only if your system requires

both R & Rc wires.

Leave the metal jumper

in place, connecting the

R & Rc terminals.

If your existing thermostat has

both V and VR wires, stop now

and contact a qualiﬁed HVAC

technician for assistance.

If your existing thermostat has

a separate O and B wire, stop

now and contact a qualiﬁed

HVAC technician for assistance.

If your existing thermostat has

both R & Rh wires, remove

metal jumper between the R

& Rc terminals. Connect the R

wire to the Rc terminal and the

Rh wire to the R terminal.

Wrap all C, C1 B or X

wires with electrical tape.

Do not connect them.

If your existing thermostat

has a C wire, it should be

wrapped with electrical

tape and not connected to

your new thermostat.

14 15

Electric

Heat

Gas/Oil

Heat

Heat Heat

(B) (O)

INSTALLINGYOURTHERMOSTAT

Electric

Heat

Gas/Oil

Heat

Heat Heat

(B) (O)



Set Fan Control Jumper

Correct placement of this J2 jumper

optimizes energy use and comfort levels

for the connected system type.

INSTALLINGYOURTHERMOSTAT

O B

Electric

Heat

Gas/Oil

Cool

Heat Cool

(B) (O)

Electric

Heat

Gas/Oil

Cool

Heat Cool

(B) (O)



Set Heat Pump Jumper

The following instructions are necessary

to check the J3 jumper placement if you

have a heat pump system.

O Leave the jumper in the Cool (O)

factory-set position if you connected an

O wire to the O/B terminal.

B Move the jumper to the Heat (B)

position if you connected a B wire to the

O/B terminal.

Gas/Oil Heat

For gas or oil systems leave the jumper in the

Gas/Oil Heat factory-set position.

Electric Heat

For electric and heat pump systems move

the jumper to the Electric Heat position.

16 17

INSTALLINGYOURTHERMOSTAT

G O/B Y W RC R

MODE

FAN

SET RUN HOLD



Completing an installation

a. Insert three Energizer® or Duracell® AAA

alkaline baeries.

b. Install the thermostat body by gently

pushing it onto the base until it “clicks” into

place. Verify that there are no gaps in the

side housing.

c. Turn the power back on to the heating and

cooling equipment.

RESETBUTTONTEMPERATUREFORMAT

Switching Between

Fahrenheit (°F) and Celsius (°C)

1. Slide the MODE switch to the

oﬀ position.

2. While holding p press SET.

3. Release both buons.

4. Repeat steps 2 and 3 to toggle

between °F and °C.

RESET

THERMOSTATFIGMINIMUMOFFTIMEMU

Oﬀ

Arrow down

Arrow up

To access the RESET buon, remove the

thermostat body from its base by gently

pulling them apart.

• Press and hold for ﬁve seconds to reset all

system seings and temperature gauges back to

factory defaults.

Note: Be careful not to

touch the black surface

on which the reset button

is mounted, and do not

clean it if dusty.

18 19

The following four features are done in a

ﬂow-through setup. The system will walk you

through each feature. To access only one

feature, follow these steps then press SET

until you come to the feature you would like

to adjust.

1. Slide the MODE switch to the oﬀ

position.

2. While holding the RESET buon press

SET, “oﬀset” will appear on the display.

Note: Do not hold the reset button for more

than ﬁve seconds.

3. Release both buons.

Note: The system will automatically exit if no

buon is pressed within 12 seconds.

Oﬀset the temperature display to read +/- 9°

F (+/- 4.5° C). This thermostat has a highly

accurate temperature sensor; if you desire

to match the display with other devices this

oﬀset feature can be used.

Note: Using this feature does not change the actual

temperature.

1. Press p or q to change the oﬀset

amount.

2. Press SET to advance to the next step.

To exit, press SET four times.

TEMPERATUREOFFSETADVANCEDSYSTEMSETUP EARLYSTART SYSTEMTYPE

Your thermostat comes preprogrammed

with early start functionality turned oﬀ. This

function allows the heating or cooling system

to turn on before the programmed start time

so that the room temperature matches the

set temperature at the start time.

1. Press p or q to toggle between OFF

and ON.

2. Press SET to advance to the next step.

To exit, press SET three times.

Your thermostat is set at the factory to

operate a standard fossil fuel furnace

heating system.

1. Press p or q to toggle between the

heat systems being used.

• If using a Heat Pump select HP.

• If using a Furnace select F.

2. Press SET to advance to the next step.

To exit, press SET two times.

20 21

MINIMUMCYCLEPERIOD

Changing the minimum cycle period to six

minutes or greater enables smart logic.

Your thermostat will learn, over time, the

best cycle times for your system and home

conditions. Using smart logic can optimize

energy use and comfort level, and allow for

seing the thermostat to turn on the system

more or less frequently.

1. Press p or q to select the desired

cycle period.

2. Press SET to accept the cycle period

and exit.

• If Heat Pump (HP) has been selected,

it will toggle between 60, 30, 20, 15,

12 and 0.

• If Furnace (F) has been selected, it will

toggle between 60, 30, 20, 15, 12, 10, 8,

6 and 0.

1-Stage heat pump 20

Compressor 20

1-Stage gas furnace heat with electric fan 12

1-Stage gas furnace heat with gas fan 12

1-Stage oil furnace 12

Steam and gravity 60

Hot water system 20

High eﬃciency furnace 20

Electric furnace 6

System Type

Cycle Period

(Minutes)

MINIMUMCYCLEPERIOD

Common Cycle Period Seings

22 23

SETTIMEANDDAY

Set the time and day

1. With the thermostat in oﬀ mode, press SET.

2. Press p or q to adjust the time.

3. Press SET to accept the time and continue.

Note: Press and hold p or q to advance

the time faster.

MODE

4. Press p or q to select the day of the

week.

5. Press SET to accept the day of the

week and exit.

SELECTMODEANDFANSETTINGS

Slide the mode switch to whether you

want to heat or cool to achieve the set

temperature.

• heat—System will activate heating to reach the

set temperature.

• oﬀ—Systems are oﬀ.

• cool—System will activate cooling to reach the

set temperature.

Slide the fan switch to the appropriate

seing to operate fan.

• auto fan—Fan will run automatically when

heating or cooling is activated.

• fan on—Fan will run continuously.

Note: Auto fan is the most commonly used seing.

heat

oﬀ

cool

auto fan

fan on

24 25

wake Set it to the time you wake up and the temperature you want

it to be at that time.

leave Set it to the time you leave the house and the temperature

you want while you are out.

return Set it to the time you return home and the temperature you

want it to be when you arrive.

sleep Set it to the time you go to sleep and the temperature you

want it while you are sleeping.

PROGRAMMEDSCHEDULES

The thermostat schedule is divided into four periods

for you to program for maximum energy savings.

ENERGYSTAR

PROGRAMMEDSCHEDULE

For optimal energy savings your thermostat is preprogrammed with the following schedule for

each day of the week. Simply switch your thermostat to the heat or cold mode and press RUN.

Period Start Time Heat Cool

wake 6:00 am 70°F 78°F

leave 8:00 am 62°F 85°F

return 6:00 pm 70°F 78°F

sleep 10:00 pm 62°F 82°F

26 27

1. Switch the thermostat to the MODE

you want to program (heat or cool) and

press SET.

2. Press p or q to scroll between days

and press SET when the day you would

like to schedule is ﬂashing.

3. Press p or q to set your wake start

time and press SET to accept the time.

MODIFYINGTHEPROGRAMMEDSCHEDULE

4. Press p or q to set the wake

temperature and press SET to accept the

temperature and proceed.

5. Follow steps 3 and 4 to set

the time and temperature for

the remaining periods.

6. Continue to set up each day individually

or use the copy feature to copy one day

to another (see page 25) or press RUN to

save and exit.

From the days of the week menu you can

copy a schedule from a single day to one or

more days. To access that menu, if you are not

already there, switch the thermostat to the

MODE you want to program (heat or cool)

and press SET.

1. Press p or q to scroll to copy and press

SET when the word “copy” is ﬂashing.

“Copy from” will appear on the display.

USINGTHECOPYFEATURE

2. Press p or q to select the day you would

like to copy and press SET when that day

is ﬂashing.

3. Press p or q to select the day you

would like to copy to. You can select an

individual day or select all to have your

schedule copied to every day of the

week.

4. Press SET to advance to the next step or

RUN to save and exit.

“Copy to” will appear on the display.

28 29

Press p or q to raise or lower the

temperature. This temporary adjustment

will remain until the start time of the next

period. The word “temporary” will be

displayed leing you know the temperature

has been adjusted.

Note: Pressing the p or q button once will

turn on the backlight. To change the setpoint

temperature press either button more than once.

OVERRIDINGSCHEDULESTEMPORARILY

You can remove the temporary seing at any

time by pressing RUN, the system will return

to your previous programmed schedule.

“Temporary” will appear on the display.

OVERRIDINGSCHEDULESPERMANENTLY

Press HOLD to override the programmed

schedule. All programmed temperature

changes for all periods will be ignored.

While the system is in hold you can manually

change the temperature at any given time

by pressing p or q. The thermostat will

maintain this temperature change until you

manually change it again or remove the hold.

You can remove the hold at any time by

pressing RUN, the system will return to your

previous programmed schedule.

“Hold.” will appear on the display.

30 31

Press HOLD for ﬁve seconds until the

manual indicator “man.” appears on the

screen.

Your thermostat now functions as a non-

programmable device with no scheduled

program. SET, RUN, and HOLD will not work

while in this seing. If it is too hot or too

cold, you will have to manually change the

temperature. Press p or q to raise or lower

the temperature.

You can exit the manual seing at any time by

pressing RUN for ﬁve seconds, the system will

return to your previous programmed schedule.

TURNINGOFFSCHEDULES

“Man.” will appear on the display.

BUILTINCOMPRESSORPROTECTION

This function helps protect against damage

to the compressor in your air conditioning

or heat pump system. The compressor is

forced to wait ﬁve minutes aer turning oﬀ

before it can turn on again. The appropriate

MODE indicator icon will ﬂash on the display

whenever this feature is running.

/ ﬂashes while minimum oﬀ time

is being enforced.

32 33

EARLYSTARTFUNCTIONALITY THERMOSTATCARE

This function allows the heating or cooling system

to turn on before the programmed start time

so that the room temperature matches the set

temperature at the start time.

Example: Your Wake time is set for 6:30 am with a

temperature of 72°. Your system will turn on before 6:30

am, so the temperature is 72° when you wake up.

Note: To turn on this function see page 17.

To prevent damage to the clear lens over the

thermostat face, use a so coon cloth and

clean with mild soap and water only.

DO NOT use paper towels or other abrasive

cloths. DO NOT spray any liquid directly

onto the thermostat.

It is recommended that the baeries

in the thermostat be replaced once

a year or before leaving the home for

a prolonged period of time.

1. Switch the system MODE to oﬀ before

changing the baeries.

2. Remove the thermostat body from its

base by gently pulling them apart.

3. Turn the thermostat over and remove

old baeries.

4. Replace them with fresh Energizer

or Duracell

alkaline AAA baeries,

carefully observing the required

polarities.

5. Reinstall the thermostat body onto its

base by gently pushing it until it “clicks”

into place.

Note: If the batteries are not changed within 7

days after the Low Battery Indicator appears

on the display, the set temperature will

increase by 10°F in cool mode, or decrease by

10°F in heat mode as a further reminder. After

90 days, or less, depending on the condition of

the batteries, the system will turn off and the

Low Battery Indicator will ﬂash on the display.

WARNING: Failure to change

batteries in a timely fashion can lead

to uncontrolled heating and cooling.

REPLACINGTHEBATTERIES

34 35

Problem:

No heating/cooling system activation

Solution:

1. Verify MODE switch is in proper heat or cool mode.

2. Check baeries. Replace if necessary. (See “Replacing the Baeries,” page 31).

3. Check set temperature. Set temperature should read above room temperature in heat

mode and below room temperature in cool mode.

4. Verify Heating/Cooling power switch isn’t oﬀ.

5. Verify that the circuit breaker isn’t tripped.

6. Verify that the furnace door is closed securely.

7. Check for loose or crossed wiring in the thermostat wiring terminal.

8. Verify that copper wires are not exposed and touching other wires.

9. Verify that the O/B jumper is installed appropriately. (See “Set Heat Pump Jumper” page

12).

10. Verify that the FAN jumper is installed appropriately.

(See “Set Fan Control Jumper” page 13).

TROUBLESHOOTING

Problem:

No fan/fan runs continuously

Solution:

1. If the fan runs continuously, verify that the thermostat is in the AUTO position not the ON

position.

2. Let the thermostat sit (do not touch) for 30 minutes to allow the temperature to stabilize.

3. Verify that the G wire in the thermostat wiring terminal is connected properly.

4. Verify Heating/Cooling power switch isn’t oﬀ.

5. Verify that the circuit breaker isn’t tripped.

6. Verify that the furnace door is closed securely.

7. Check for loose or crossed wiring in the thermostat wiring terminal.

8. Verify that copper wires are not exposed and touching other wires.

9. Verify that the fan jumper is installed appropriately. (See “set fan control jumper” page 13).

TROUBLESHOOTING

36 37

Problem:

Incorrect room temperature

Solution:

1. Let the thermostat sit (do not touch) for 30 minutes to allow the temperature to stabilize.

2. Check placement of thermostat; make sure it’s not in an unusually dray or heated area.

3. Verify that the wall hole for wires is insulated properly.

4. Check Temperature Oﬀset (see “Temperature Oﬀset,” page 16).

Problem: Buons below display do not function

Solution: Verify that the thermostat is not in MANUAL mode

(see “Turning Oﬀ Schedules,” page 28).

TROUBLESHOOTING

Problem: Not reaching set temperature

Solution:

1. Verify that the MODE switch is in proper heat or cool mode.

2. Verify that Heating/Cooling systems are working properly.

(See “No heating/cooling system activation,” page 32.)

3. Check for loose or crossed wiring in the thermostat wiring terminal.

4. Check Temperature Oﬀset (see “Temperature Oﬀset,” page 16).

5. Check placement of thermostat; make sure it’s not in an unusually dray or heated area.

6. Verify that the wall hole for wires is insulated properly.

7. Verify that the O/B jumper is installed appropriately. (See “Set Heat Pump Jumper” page

12).

Problem: Wrong temperature scale displayed

Solution: See “Temperature Format,” page 15.

TROUBLESHOOTING

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Orbit 83521 User manual

Brand: Orbit

Model: 83521

Category: Thermostats

Type: User manual

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